Improvement in grubbing-machines



D. C. PAYNE. GRUBBING MACHINE.

1n: Nonms Penas to. moro-Limo.. wAsmNcvoN, n. c,

UNITED NSTATES PATENT OFFICE.

DAVID C. PAYNE, OF ELKHART, INDIANA.

IMPROVEMENT IN GRUBBlNG-MACHINES.

Specification forming part of Letters Patent No. 36,022, dated July 29, 1862.

To all whom it may concern:

Be it known that I, DAVID C. PAYNE, of Elkhart, in the county of Elkhart and State of Indiana, have invented a new and Improved Grru`bbingl\/Iachine;v and vI do hereby declare that the following is a full, clear, and exact description of the same, reference being had tothe accompanying drawings, making a part of this specification, in which- Figure lisa side elevation of my improved machine (shown in red) in 'position for pulling a grub or stump.. Fig. 2 is a plan f the same.

Similar letters of reference indicate corresponding parts in the two figures.

The object of this invention is to obtain a light, simple, and inexpensive machine for pulling or extracting grabs and stumps from the earth' Vin clearing new land; and it consists in a peculiar device for automatically locking and unlocking' the wheels ofthemachine at the Aproper moment, the former to cause the wheels, in connection with the axle, to forn'1tl1e` fulcrurn of the lever, and the latter to allow the machine to be used for transporting` the grub or stump from the field as will be hereinafter fully explained.

To enable others skilled in the art to fully understand and use my invention I will proceed to describe its construction and operation.

A represents a long lever, which may be made of a single piece of timber, or of several thin pieces united together by glue or in any other suitable manner. This leveris supported near its back end on top and in the middle of an axle-B, which is crooked from the inside of the 1j ournals or gudgcons on which the wheels C C are loosely fitted, the top side of the axle being its convex surface. The axle B, which. is in curved form inside of its journals, is designed to be cast hollow,of cast or malleable iron, with a flange on two opposite sides, to which flanges the lever is secured by bolts which pass vertically through the lever and iianges and have nuts screwed on their lowervends. Attached to the top side of thele` ver at the back end, and extending equally over each side ofthe axle, is a metal plate for strengthening that end of the lever, and also furnishing an unyielding seat for the bibel), l

.in stirrups Z b, the ar which restson the plate at the extreme end of the lever, and is firmly secured thereto by one or more bolts passing through it and the lever and fastened by nuts on the under side. Attached concentrically to the inner sides of the wheels C C are annular toothed rims D D,the teeth of said rims being on their outer periphery. Arranged on the underside of thelever in front of the annular toothed rims isalockbar, E, which. is provided with a central arm, a, and fitted to have lo gitudinal movement m/snsliding in staples or clips c c. The loclcbar E extends on each side of the lever a distance equal or nearly equal to that of the back sides of the annular toothed rims from the middle of the axle. The

'end of the arm a of the lock-bar E terminates in a straight hook, which projects to one side Vof the lever andl in front of a weight, Rwhich is attached to the side of thelcver by a pivot,

which allows the weight to always retain its I vertical position without regard to the position of the lever.

H is a U-shaped clevis of about one-third (more or less) greater width than, the' lever, and bent at its Vends in hook form, so vas to catch over the axle. In the middle of the bend of the clevis on the inside is a smooth spaee,-and on each'side of it feathered orv knife edge, the former to hold the clevis inl a central positiomwhile the vlatter bury themselves in the surface of the wood.

The operation is as follows: The machinebel ing first backed up to the grub or stump to be pulled,the lever is turned up in apo'sition sh'own in red in Fig. 1, the bite resting against the grub close to the ground,aud the lock-bar resting in the teeth of the annular toothed rims, and'thereby locking the wheels and le-4 ver together. rlhe clevis is then put around or over the grub accordingly asV the tree is standing or cutdown,and hooked over the axle.

The power to pull the grub or stump is applied to the upper end' ofthe lever in the usual manner; As vthe lever descends at its front end in the act of pulling the grub or stump from the earth', the wheels, being locked to the lever, move simultaneously therewith l and correspondingly advance until the lever attains la horizontal position, when the weight, pressing against the straight hook of the arm, withdraws the lock-bar from the teeth of the annular rims, and thus leaves the wheels free to turn independently upon their axles, whereby the machine is adapted to use in transporting the grub or stump in the machine from the field.' The, crooked axle forms a very rm and unyielding fulcrum for the lever, and also serves to apply the power thereof more direct to' the grub in extracting it from the ground than with the straight axle.

VI am aware that pivoted pawls or braces yhave -been used in connection With'anuular Having described my invention, what I do claim, and desire to secure by Letters Patent,

The lever'A, lock-bal-E, hooked arm a, and Weight F, with the annular toothed rims D D', wheels C C', and crooked axle B, when combined and arranged to operate in the manner andY for the purpose set forth.

D. C. PAYNE.

' Witnesses:

' J. A. GAUBERSCHMIDT,

CHARLES SMITH. 

